Ali. Mayweather is a dumb idiot. Don't even bring him up when comparing intellect. Mayweather is a gifted 'once in a 100 years boxer' like Ali, but not in the brains department. Not by a longshot. Ali was both street smart, political smart and financially smart. All that without a classic education. That deserves big respect.
:deal The clues in the name. Got a degree in mathematics around the same time he was winning the british and European titles. I think Matthew Macklin also used to study Law but dropped out to focus on boxing full time.
I dunno - the glasses help (see Curb Your Enthusiasm) - he's smarter than the average boxer, but whenever he talks at length, and he does that a lot, he comes across as ******ed as he goes nowhere with his exaggerated and feeble pontifications. Reminds me of Chris Eubank. One of the most honest, in my opinion, is Mike Tyson. Is that a sign of intelligence?